Abstract
In this study, a novel core-shell Fe3O4@MIL-101 (MIL stands for Materials of Institute Lavoisier) composite was successfully synthesized by hydrothermal method and was fully characterized by X-ray diffraction, transmission electron microscopy, Fourier-transform infrared spectra, and X-ray photoelectron spectroscopy. The composite was introduced as a catalyst to generate powerful radicals from persulfate for the removal of Acid Orange 7 in an aqueous solution. Effects of the central metal ions of MIL-101, amino group content of MIL-101, and pH were evaluated in batch experiments. It was found that both hydroxyl and sulfate radicals were generated; importantly, sulfate radicals were speculated to serve as the dominant active species in the catalytic oxidation of Acid Orange 7. In addition, a possible mechanism was proposed. This study provides new physical insights for the rational design of advanced metal-organic frameworks (MOF)-based catalysts for improved environmental remediation.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation, China (Grant No. 51578264), the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2013EEM004), and the Shandong Provincial Science and Technology Development Program, China (Grant No. 2014GSF117008).
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Yue, X., Guo, W., Li, X. et al. Core-shell Fe3O4@MIL-101(Fe) composites as heterogeneous catalysts of persulfate activation for the removal of Acid Orange 7. Environ Sci Pollut Res 23, 15218–15226 (2016). https://doi.org/10.1007/s11356-016-6702-5
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DOI: https://doi.org/10.1007/s11356-016-6702-5